@echo OFF
REM **************************************************************************
REM *** IsItFri.bat - Use CEnvi from a batch file to determine if today is ***
REM ***               Friday.  CEnvi is called from one line and sets      ***
REM ***               ERRORLEVEL (by its return value) to 1 if it is       ***
REM ***               Friday and 0 if it is not Friday.  The batch file    ***
REM ***               may then switch actions based on that ERROLEVEL      ***
REM **************************************************************************

cenvi  "DateString = ctime(time())  return( strstr(DateString,"Fri") ? 1 : 0 )"

if ErrorLevel 1 ECHO WHOOPEE! It Is Friday
if not ErrorLevel 1 ECHO Dang! It is Not Friday